I had a new motor installed only last week. After 1 day of driving, speedometer and odometer stopped working. Then check engine light came on. In the meantime i noticed a buzzer indicating the center lock differential was not unlocking and car was hard to control and turn. Since then the lock differential issue has been solved. Now the oil pressure light will glow slowly and stay lit once the car has been running for a while. Recently, i just started the car and the engine coolant pressure guage shot above the red light even without driving the car. What is going on?